COATED CUTTING TOOL

WIPO Patent Application WO/2014/034923

A1

The purpose of the present invention is to provide a coated cutting tool with a long machining length and a long tool life and for which the area of removed coated layer is small even when machining under heavy machining conditions. The present invention is a coated cutting tool comprising a base material and a coating layer formed on a base material surface, and the coating layer comprises a top layer on the surface side and a bottom-most layer on the base material side. The bottom-most layer is configured as (AlaTibMc)N [provided that M represents at least one element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Y, B, and Si; a represents the atomic ratio of elemental Al with respect to the total of elemental Al, elemental Ti, and elemental M; b represents the atomic ratio of elemental Ti with respect to the total of elemental Al, elemental Ti, and elemental M; c represents the atomic ratio of elemental M with respect to the total of elemental Al, elemental Ti, and elemental M; and a, b, and c satisfy 0.30≤a≤0.70, 0.30≤b≤0.70, 0≤c≤0.20, and a+b+c=1], and the mean particle diameter of the (AlaTibMc)N particle comprising the bottom-most layer is no more than 400 nm.

KIKUCHI MASAKAZU (JP)
ASARI SHOTA (JP)

PCT/JP2013/073475

March 06, 2014

September 02, 2013

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TUNGALOY CORP (JP)

B23B27/14; C23C14/06

JP2009255282A	2009-11-05
JP2011218542A	2011-11-04
JPH11279745A	1999-10-12
JPH05345976A	1993-12-27

TSUKUNI & ASSOCIATES et al. (JP)
Patent business corporation Tsukuni (JP)

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